1 files changed, 448 insertions, 0 deletions
diff --git a/archivers/libarchive/files/libarchive/archive_cryptor.c b/archivers/libarchive/files/libarchive/archive_cryptor.c
new file mode 100644
index 00000000000..0be30c601a9
--- /dev/null
+++ b/archivers/libarchive/files/libarchive/archive_cryptor.c
@@ -0,0 +1,448 @@
+/*-
+* Copyright (c) 2014 Michihiro NAKAJIMA
+* All rights reserved.
+*
+* Redistribution and use in source and binary forms, with or without
+* modification, are permitted provided that the following conditions
+* are met:
+* 1. Redistributions of source code must retain the above copyright
+*    notice, this list of conditions and the following disclaimer.
+* 2. Redistributions in binary form must reproduce the above copyright
+*    notice, this list of conditions and the following disclaimer in the
+*    documentation and/or other materials provided with the distribution.
+*
+* THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
+* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+* IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
+* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+#include "archive_platform.h"
+
+#ifdef HAVE_STRING_H
+#include <string.h>
+#endif
+#include "archive.h"
+#include "archive_cryptor_private.h"
+
+/*
+ * On systems that do not support any recognized crypto libraries,
+ * this file will normally define no usable symbols.
+ *
+ * But some compilers and linkers choke on empty object files, so
+ * define a public symbol that will always exist.  This could
+ * be removed someday if this file gains another always-present
+ * symbol definition.
+ */
+int __libarchive_cryptor_build_hack(void) {
+	return 0;
+}
+
+#ifdef ARCHIVE_CRYPTOR_USE_Apple_CommonCrypto
+
+static int
+pbkdf2_sha1(const char *pw, size_t pw_len, const uint8_t *salt,
+    size_t salt_len, unsigned rounds, uint8_t *derived_key,
+    size_t derived_key_len)
+{
+	CCKeyDerivationPBKDF(kCCPBKDF2, (const char *)pw,
+	    pw_len, salt, salt_len, kCCPRFHmacAlgSHA1, rounds,
+	    derived_key, derived_key_len);
+	return 0;
+}
+
+#elif defined(_WIN32) && !defined(__CYGWIN__) && defined(HAVE_BCRYPT_H)
+#ifdef _MSC_VER
+#pragma comment(lib, "Bcrypt.lib")
+#endif
+
+static int
+pbkdf2_sha1(const char *pw, size_t pw_len, const uint8_t *salt,
+	size_t salt_len, unsigned rounds, uint8_t *derived_key,
+	size_t derived_key_len)
+{
+	NTSTATUS status;
+	BCRYPT_ALG_HANDLE hAlg;
+
+	status = BCryptOpenAlgorithmProvider(&hAlg, BCRYPT_SHA1_ALGORITHM,
+		MS_PRIMITIVE_PROVIDER, BCRYPT_ALG_HANDLE_HMAC_FLAG);
+	if (!BCRYPT_SUCCESS(status))
+		return -1;
+
+	status = BCryptDeriveKeyPBKDF2(hAlg,
+		(PUCHAR)(uintptr_t)pw, (ULONG)pw_len,
+		(PUCHAR)(uintptr_t)salt, (ULONG)salt_len, rounds,
+		(PUCHAR)derived_key, (ULONG)derived_key_len, 0);
+
+	BCryptCloseAlgorithmProvider(hAlg, 0);
+
+	return (BCRYPT_SUCCESS(status)) ? 0: -1;
+}
+
+#elif defined(HAVE_LIBNETTLE) && defined(HAVE_NETTLE_PBKDF2_H)
+
+static int
+pbkdf2_sha1(const char *pw, size_t pw_len, const uint8_t *salt,
+    size_t salt_len, unsigned rounds, uint8_t *derived_key,
+    size_t derived_key_len) {
+	pbkdf2_hmac_sha1((unsigned)pw_len, (const uint8_t *)pw, rounds,
+	    salt_len, salt, derived_key_len, derived_key);
+	return 0;
+}
+
+#elif defined(HAVE_LIBCRYPTO) && defined(HAVE_PKCS5_PBKDF2_HMAC_SHA1)
+
+static int
+pbkdf2_sha1(const char *pw, size_t pw_len, const uint8_t *salt,
+    size_t salt_len, unsigned rounds, uint8_t *derived_key,
+    size_t derived_key_len) {
+
+	PKCS5_PBKDF2_HMAC_SHA1(pw, pw_len, salt, salt_len, rounds,
+	    derived_key_len, derived_key);
+	return 0;
+}
+
+#else
+
+/* Stub */
+static int
+pbkdf2_sha1(const char *pw, size_t pw_len, const uint8_t *salt,
+    size_t salt_len, unsigned rounds, uint8_t *derived_key,
+    size_t derived_key_len) {
+	(void)pw; /* UNUSED */
+	(void)pw_len; /* UNUSED */
+	(void)salt; /* UNUSED */
+	(void)salt_len; /* UNUSED */
+	(void)rounds; /* UNUSED */
+	(void)derived_key; /* UNUSED */
+	(void)derived_key_len; /* UNUSED */
+	return -1; /* UNSUPPORTED */
+}
+
+#endif
+
+#ifdef ARCHIVE_CRYPTOR_USE_Apple_CommonCrypto
+# if MAC_OS_X_VERSION_MAX_ALLOWED < 1090
+#  define kCCAlgorithmAES kCCAlgorithmAES128
+# endif
+
+static int
+aes_ctr_init(archive_crypto_ctx *ctx, const uint8_t *key, size_t key_len)
+{
+	CCCryptorStatus r;
+
+	ctx->key_len = key_len;
+	memcpy(ctx->key, key, key_len);
+	memset(ctx->nonce, 0, sizeof(ctx->nonce));
+	ctx->encr_pos = AES_BLOCK_SIZE;
+	r = CCCryptorCreateWithMode(kCCEncrypt, kCCModeECB, kCCAlgorithmAES,
+	    ccNoPadding, NULL, key, key_len, NULL, 0, 0, 0, &ctx->ctx);
+	return (r == kCCSuccess)? 0: -1;
+}
+
+static int
+aes_ctr_encrypt_counter(archive_crypto_ctx *ctx)
+{
+	CCCryptorRef ref = ctx->ctx;
+	CCCryptorStatus r;
+
+	r = CCCryptorReset(ref, NULL);
+	if (r != kCCSuccess)
+		return -1;
+	r = CCCryptorUpdate(ref, ctx->nonce, AES_BLOCK_SIZE, ctx->encr_buf,
+	    AES_BLOCK_SIZE, NULL);
+	return (r == kCCSuccess)? 0: -1;
+}
+
+static int
+aes_ctr_release(archive_crypto_ctx *ctx)
+{
+	memset(ctx->key, 0, ctx->key_len);
+	memset(ctx->nonce, 0, sizeof(ctx->nonce));
+	return 0;
+}
+
+#elif defined(_WIN32) && !defined(__CYGWIN__) && defined(HAVE_BCRYPT_H)
+
+static int
+aes_ctr_init(archive_crypto_ctx *ctx, const uint8_t *key, size_t key_len)
+{
+	BCRYPT_ALG_HANDLE hAlg;
+	BCRYPT_KEY_HANDLE hKey;
+	DWORD keyObj_len, aes_key_len;
+	PBYTE keyObj;
+	ULONG result;
+	NTSTATUS status;
+	BCRYPT_KEY_LENGTHS_STRUCT key_lengths;
+
+	ctx->hAlg = NULL;
+	ctx->hKey = NULL;
+	ctx->keyObj = NULL;
+	switch (key_len) {
+	case 16: aes_key_len = 128; break;
+	case 24: aes_key_len = 192; break;
+	case 32: aes_key_len = 256; break;
+	default: return -1;
+	}
+	status = BCryptOpenAlgorithmProvider(&hAlg, BCRYPT_AES_ALGORITHM,
+		MS_PRIMITIVE_PROVIDER, 0);
+	if (!BCRYPT_SUCCESS(status))
+		return -1;
+	status = BCryptGetProperty(hAlg, BCRYPT_KEY_LENGTHS, (PUCHAR)&key_lengths,
+		sizeof(key_lengths), &result, 0);
+	if (!BCRYPT_SUCCESS(status)) {
+		BCryptCloseAlgorithmProvider(hAlg, 0);
+		return -1;
+	}
+	if (key_lengths.dwMinLength > aes_key_len
+		|| key_lengths.dwMaxLength < aes_key_len) {
+		BCryptCloseAlgorithmProvider(hAlg, 0);
+		return -1;
+	}
+	status = BCryptGetProperty(hAlg, BCRYPT_OBJECT_LENGTH, (PUCHAR)&keyObj_len,
+		sizeof(keyObj_len), &result, 0);
+	if (!BCRYPT_SUCCESS(status)) {
+		BCryptCloseAlgorithmProvider(hAlg, 0);
+		return -1;
+	}
+	keyObj = (PBYTE)HeapAlloc(GetProcessHeap(), 0, keyObj_len);
+	if (keyObj == NULL) {
+		BCryptCloseAlgorithmProvider(hAlg, 0);
+		return -1;
+	}
+	status = BCryptSetProperty(hAlg, BCRYPT_CHAINING_MODE,
+		(PUCHAR)BCRYPT_CHAIN_MODE_ECB, sizeof(BCRYPT_CHAIN_MODE_ECB), 0);
+	if (!BCRYPT_SUCCESS(status)) {
+		BCryptCloseAlgorithmProvider(hAlg, 0);
+		HeapFree(GetProcessHeap(), 0, keyObj);
+		return -1;
+	}
+	status = BCryptGenerateSymmetricKey(hAlg, &hKey,
+		keyObj, keyObj_len,
+		(PUCHAR)(uintptr_t)key, (ULONG)key_len, 0);
+	if (!BCRYPT_SUCCESS(status)) {
+		BCryptCloseAlgorithmProvider(hAlg, 0);
+		HeapFree(GetProcessHeap(), 0, keyObj);
+		return -1;
+	}
+
+	ctx->hAlg = hAlg;
+	ctx->hKey = hKey;
+	ctx->keyObj = keyObj;
+	ctx->keyObj_len = keyObj_len;
+	ctx->encr_pos = AES_BLOCK_SIZE;
+
+	return 0;
+}
+
+static int
+aes_ctr_encrypt_counter(archive_crypto_ctx *ctx)
+{
+	NTSTATUS status;
+	ULONG result;
+
+	status = BCryptEncrypt(ctx->hKey, (PUCHAR)ctx->nonce, AES_BLOCK_SIZE,
+		NULL, NULL, 0, (PUCHAR)ctx->encr_buf, AES_BLOCK_SIZE,
+		&result, 0);
+	return BCRYPT_SUCCESS(status) ? 0 : -1;
+}
+
+static int
+aes_ctr_release(archive_crypto_ctx *ctx)
+{
+
+	if (ctx->hAlg != NULL) {
+		BCryptCloseAlgorithmProvider(ctx->hAlg, 0);
+		ctx->hAlg = NULL;
+		BCryptDestroyKey(ctx->hKey);
+		ctx->hKey = NULL;
+		HeapFree(GetProcessHeap(), 0, ctx->keyObj);
+		ctx->keyObj = NULL;
+	}
+	memset(ctx, 0, sizeof(*ctx));
+	return 0;
+}
+
+#elif defined(HAVE_LIBNETTLE) && defined(HAVE_NETTLE_AES_H)
+
+static int
+aes_ctr_init(archive_crypto_ctx *ctx, const uint8_t *key, size_t key_len)
+{
+	ctx->key_len = key_len;
+	memcpy(ctx->key, key, key_len);
+	memset(ctx->nonce, 0, sizeof(ctx->nonce));
+	ctx->encr_pos = AES_BLOCK_SIZE;
+	memset(&ctx->ctx, 0, sizeof(ctx->ctx));
+	return 0;
+}
+
+static int
+aes_ctr_encrypt_counter(archive_crypto_ctx *ctx)
+{
+	aes_set_encrypt_key(&ctx->ctx, ctx->key_len, ctx->key);
+	aes_encrypt(&ctx->ctx, AES_BLOCK_SIZE, ctx->encr_buf, ctx->nonce);
+	return 0;
+}
+
+static int
+aes_ctr_release(archive_crypto_ctx *ctx)
+{
+	memset(ctx, 0, sizeof(*ctx));
+	return 0;
+}
+
+#elif defined(HAVE_LIBCRYPTO)
+
+static int
+aes_ctr_init(archive_crypto_ctx *ctx, const uint8_t *key, size_t key_len)
+{
+
+	switch (key_len) {
+	case 16: ctx->type = EVP_aes_128_ecb(); break;
+	case 24: ctx->type = EVP_aes_192_ecb(); break;
+	case 32: ctx->type = EVP_aes_256_ecb(); break;
+	default: ctx->type = NULL; return -1;
+	}
+
+	ctx->key_len = key_len;
+	memcpy(ctx->key, key, key_len);
+	memset(ctx->nonce, 0, sizeof(ctx->nonce));
+	ctx->encr_pos = AES_BLOCK_SIZE;
+	EVP_CIPHER_CTX_init(&ctx->ctx);
+	return 0;
+}
+
+static int
+aes_ctr_encrypt_counter(archive_crypto_ctx *ctx)
+{
+	int outl = 0;
+	int r;
+
+	r = EVP_EncryptInit_ex(&ctx->ctx, ctx->type, NULL, ctx->key, NULL);
+	if (r == 0)
+		return -1;
+	r = EVP_EncryptUpdate(&ctx->ctx, ctx->encr_buf, &outl, ctx->nonce,
+	    AES_BLOCK_SIZE);
+	if (r == 0 || outl != AES_BLOCK_SIZE)
+		return -1;
+	return 0;
+}
+
+static int
+aes_ctr_release(archive_crypto_ctx *ctx)
+{
+	EVP_CIPHER_CTX_cleanup(&ctx->ctx);
+	memset(ctx->key, 0, ctx->key_len);
+	memset(ctx->nonce, 0, sizeof(ctx->nonce));
+	return 0;
+}
+
+#else
+
+#define ARCHIVE_CRYPTOR_STUB
+/* Stub */
+static int
+aes_ctr_init(archive_crypto_ctx *ctx, const uint8_t *key, size_t key_len)
+{
+	(void)ctx; /* UNUSED */
+	(void)key; /* UNUSED */
+	(void)key_len; /* UNUSED */
+	return -1;
+}
+
+static int
+aes_ctr_encrypt_counter(archive_crypto_ctx *ctx)
+{
+	(void)ctx; /* UNUSED */
+	return -1;
+}
+
+static int
+aes_ctr_release(archive_crypto_ctx *ctx)
+{
+	(void)ctx; /* UNUSED */
+	return 0;
+}
+
+#endif
+
+#ifdef ARCHIVE_CRYPTOR_STUB
+static int
+aes_ctr_update(archive_crypto_ctx *ctx, const uint8_t * const in,
+    size_t in_len, uint8_t * const out, size_t *out_len)
+{
+	(void)ctx; /* UNUSED */
+	(void)in; /* UNUSED */
+	(void)in_len; /* UNUSED */
+	(void)out; /* UNUSED */
+	(void)out_len; /* UNUSED */
+	aes_ctr_encrypt_counter(ctx); /* UNUSED */ /* Fix unused function warning */
+	return -1;
+}
+
+#else
+static void
+aes_ctr_increase_counter(archive_crypto_ctx *ctx)
+{
+	uint8_t *const nonce = ctx->nonce;
+	int j;
+
+	for (j = 0; j < 8; j++) {
+		if (++nonce[j])
+			break;
+	}
+}
+
+static int
+aes_ctr_update(archive_crypto_ctx *ctx, const uint8_t * const in,
+    size_t in_len, uint8_t * const out, size_t *out_len)
+{
+	uint8_t *const ebuf = ctx->encr_buf;
+	unsigned pos = ctx->encr_pos;
+	unsigned max = (unsigned)((in_len < *out_len)? in_len: *out_len);
+	unsigned i;
+
+	for (i = 0; i < max; ) {
+		if (pos == AES_BLOCK_SIZE) {
+			aes_ctr_increase_counter(ctx);
+			if (aes_ctr_encrypt_counter(ctx) != 0)
+				return -1;
+			while (max -i >= AES_BLOCK_SIZE) {
+				for (pos = 0; pos < AES_BLOCK_SIZE; pos++)
+					out[i+pos] = in[i+pos] ^ ebuf[pos];
+				i += AES_BLOCK_SIZE;
+				aes_ctr_increase_counter(ctx);
+				if (aes_ctr_encrypt_counter(ctx) != 0)
+					return -1;
+			}
+			pos = 0;
+			if (i >= max)
+				break;
+		}
+		out[i] = in[i] ^ ebuf[pos++];
+		i++;
+	}
+	ctx->encr_pos = pos;
+	*out_len = i;
+
+	return 0;
+}
+#endif /* ARCHIVE_CRYPTOR_STUB */
+
+
+const struct archive_cryptor __archive_cryptor =
+{
+  &pbkdf2_sha1,
+  &aes_ctr_init,
+  &aes_ctr_update,
+  &aes_ctr_release,
+  &aes_ctr_init,
+  &aes_ctr_update,
+  &aes_ctr_release,
+};